The location was a little difficult to nail down using maps.me but google maps should lead you to the right place. The gym is tucked back behind some houses accessible only by sidewalk. Ask a local where it is and they should recognize the name and point you in the right direction. The training experience was incredibly fun and tiresome. The trainers were all very helpful and encouraging. The meals provided at the gym were delicious and just what you need after working out. There’s a 7-11 on the main road that you can stock up on some large waters at that you’ll need, but the gym does have smaller bottles to buy and a slowly trickling water cooler. I will definitely return the next time I’m in Bangkok!